Orbit Fit and Astrometric record for 13GJ137

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 13GJ137   
# Created Mon Oct 23 01:38:14 2017
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   32
# Arc:   3.18y
# First observation: 2013/03/07
#  Last observation: 2016/05/10
Preliminary a, adot, b, bdot, g, gdot:
  -0.000573   0.037033   0.000149  -0.011206   0.031590   0.000000
# Chi-squared of fit:     9.72 DOF:   58 RMS:  0.10
# Min/Max residuals:    -0.35    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.730901E-05  3.615295E-02 -4.848343E-06 -1.085861E-02  3.173993E-02 -6.613838E-03
# Covariance matrix:
  1.6150E-13 -1.2933E-13 -1.1880E-14  3.1314E-14  6.1809E-14 -9.8090E-13
 -1.2933E-13  3.1973E-13  3.6892E-14 -1.0029E-13  6.2918E-14  3.1648E-12
 -1.1880E-14  3.6892E-14  9.9139E-14 -7.4947E-14  7.0360E-15  4.7720E-13
  3.1314E-14 -1.0029E-13 -7.4947E-14  1.1478E-13 -2.0748E-14 -1.2955E-12
  6.1809E-14  6.2918E-14  7.0360E-15 -2.0748E-14  1.4725E-13  6.6660E-13
 -9.8090E-13  3.1648E-12  4.7720E-13 -1.2955E-12  6.6660E-13  4.0868E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.120068 -143.022695    0.759298    0.023702   -0.639213  2456359.042338
# Heliocentric elements and errors
Epoch:              2456350.5000  =  2013/02/27
Mean Anomaly:          324.89668 +/-     0.012
Argument of Peri:      230.99661 +/-     0.028
Long of Asc Node:       42.47988 +/-     0.000
Inclination:            16.89508 +/-     0.000
Eccentricity:         0.26455022 +/-    0.0001
Semi-Major Axis:     39.39636738 +/-    0.0034
Time of Perihelion: 2465157.5071 +/-       2.8
Perihelion:          28.97404992 +/-    0.0064
Aphelion:            49.81868485 +/-    0.0073
Period (y)              247.2820 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.11864866 +/-    0.0003
Ecliptic Y          -18.71395954 +/-    0.0002
Ecliptic Z            1.16538541 +/-    0.0000
Ecliptic XDOT         0.00229729 +/-    0.0000
Ecliptic YDOT        -0.00216853 +/-    0.0000
Ecliptic ZDOT        -0.00095698 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.15204834 +/-    0.0003
Geocenter to KBO     31.50605187 +/-    0.0004
# Hcoef:  8.61

The following table shows the complete astrometric record for 13GJ137. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (13GJ137) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.54156  14 21 22.947  -11 50 19.40  23.0r 13GJ137   568  C~1XRX      
2013 04  04.54263  14 19 15.132  -11 41 21.93  23.4r 13GJ137   568  C~1XRX      
2013 04  07.40318  14 18 59.128  -11 40 14.49  23.2r 13GJ137   568  C~1XRX      
2013 04  07.44689  14 18 58.874  -11 40 13.56  23.7r 13GJ137   568  C~1XRX      
2013 04  08.43552  14 18 53.246  -11 39 50.08  23.2r 13GJ137   568  C~1XRX      
2013 04  08.48075  14 18 52.986  -11 39 48.90  23.2r 13GJ137   568  C~1XRX      
2013 04  09.38210  14 18 47.827  -11 39 27.43  23.1r 13GJ137   568  C~1XRX      
2013 04  09.42533  14 18 47.579  -11 39 26.38  23.7r 13GJ137   568  C~1XRX      
2013 04  09.46848  14 18 47.322  -11 39 25.32  23.4r 13GJ137   568  C~1XRX      
2013 05  12.47149  14 15 29.533  -11 26 06.87  23.8r 13GJ137   568  C~1XRX      
2013 06  12.35550  14 12 55.911  -11 17 19.00        13GJ137   568  C~1XRX      
2013 06  12.39986  14 12 55.719  -11 17 18.48  23.6r 13GJ137   568  C~1XRX      
2013 07  04.31530  14 11 55.253  -11 15 38.35  23.9r 13GJ137   568  C~1XRX      
2013 07  06.32311  14 11 52.249  -11 15 43.17  23.0r 13GJ137   568  C~1XRX      
2014 02  02.65078  14 29 20.924  -13 07 33.70  24.0r 13GJ137   568  C~1XRX      
2014 02  02.65647  14 29 20.929  -13 07 33.44  23.9r 13GJ137   568  C~1XRX      
2014 02  03.59530  14 29 21.597  -13 07 39.86  23.7r 13GJ137   568  C~1XRX      
2014 02  24.60122  14 29 07.491  -13 07 44.01  23.6r 13GJ137   568  C~1XRX      
2014 02  25.58427  14 29 05.523  -13 07 38.12  23.8r 13GJ137   568  C~1XRX      
2014 02  28.53222  14 28 58.924  -13 07 16.97  23.7r 13GJ137   568  C~1XRX      
2014 03  28.44948  14 27 12.149  -13 00 36.09  22.9r 13GJ137   568  C~2KOF      
2014 03  28.48858  14 27 11.941  -13 00 35.33  23.5r 13GJ137   568  C~1XRX      
2014 04  05.42266  14 26 29.897  -12 57 49.57  23.0r 13GJ137   568  C~1XRX      
2014 04  23.21994  14 24 45.06   -12 50 55.6         13GJ137   W84  C~1j9S      
2014 04  24.24178  14 24 38.78   -12 50 31.0   24.7V 13GJ137   W84  C~1j9S      
2014 04  25.24174  14 24 32.64   -12 50 07.1         13GJ137   W84  C~1j9S      
2014 05  22.44204  14 21 49.659  -12 39 48.53  23.8r 13GJ137   568  C~1XRX      
2014 05  25.40542  14 21 33.436  -12 38 50.38  23.4r 13GJ137   568  C~1XRX      
2014 05  25.43431  14 21 33.273  -12 38 49.95  23.5r 13GJ137   568  C~1XRX      
2014 07  18.29220  14 18 46.874  -12 32 36.69  23.8r 13GJ137   568  C~1XRX      
2016 05  10.32654  14 38 05.586  -15 19 27.77  23.3r 13GJ137   568  C~2KOF      
2016 05  10.40239  14 38 05.108  -15 19 26.16  23.5r 13GJ137   568  C~2KOF      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

  1   0.0000      0.00     0.14       0.00    -0.12
  2   0.0767  -1949.73     0.12    -102.91    -0.04
  3   0.0845  -2193.98     0.02    -115.95     0.18
  4   0.0846  -2197.81     0.03    -116.29     0.08
  5   0.0873  -2283.63     0.00    -121.11    -0.01
  6   0.0874  -2287.63     0.02    -121.24     0.11
  7   0.0899  -2366.28     0.03    -125.72    -0.04
  8   0.0900  -2370.07     0.09    -125.92    -0.00
  9   0.0901  -2373.98     0.03    -126.15     0.00
 10   0.1805  -5382.93     0.06    -326.09     0.02
 11   0.2651  -7691.94    -0.09    -575.04     0.07
 12   0.2652  -7694.78    -0.35    -575.49     0.03
 13   0.3252  -8568.41    -0.03    -776.64    -0.05
 14   0.3307  -8608.56     0.01    -795.90    -0.30
 15   0.9093   8122.07    -0.05   -2141.61    -0.24
 16   0.9093   8122.06    -0.12   -2141.34     0.05
 17   0.9119   8133.37    -0.07   -2144.34    -0.04
 18   0.9694   7939.01    -0.15   -2213.75     0.04
 19   0.9721   7909.84    -0.02   -2217.30    -0.02
 20   0.9801   7811.57    -0.04   -2227.87     0.05
 21   1.0566   6203.06     0.04   -2344.90     0.01
 22   1.0567   6199.94    -0.05   -2345.15    -0.03
 23   1.0784   5564.12    -0.13   -2384.56     0.07
 24   1.1271   3978.56     0.07   -2484.23     0.08
 25   1.1299   3883.65     0.03   -2490.48     0.06
 26   1.1326   3790.90     0.26   -2496.75    -0.07
 27   1.2071   1333.90     0.01   -2681.61     0.04
 28   1.2152   1090.42     0.03   -2703.62     0.07
 29   1.2153   1088.02     0.02   -2703.99    -0.07
 30   1.3628  -1336.90     0.07   -3144.67     0.05
 31   3.1753  17891.76    -0.03   -7290.30     0.01
 32   3.1755  17884.63     0.06   -7290.89    -0.03

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

13GJ137    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.270    39.277    39.262
ecceobj         0.264     0.265     0.264
incobj         16.915    16.915    16.915
qmin           27.720    27.777    27.683
qmax           51.712    51.640    51.724
amean          39.454    39.454    39.454
amin           39.035    39.019    39.034
amax           39.974    39.975    39.949
emean           0.252     0.252     0.252
emin            0.197     0.197     0.197
emax            0.296     0.294     0.297
imean          17.169    17.185    17.156
imin           15.153    15.193    15.118
imax           19.068    19.079    19.061
excite_mean     0.389     0.389     0.389
fracstop        1.000     1.000     1.000
cjmean          2.879     2.879     2.879

libcent 0       180.4     180.7     180.4
libamp  0        73.8      77.9      70.8
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       272.6     272.6     272.6
kozaiamp         41.5      41.8      41.3